The Russian cosmonaut lurks around every bend on the space station. Still referring to Howard as "Froot Loops," Dimitri pokes his head in to further take Howard aback while Wolowitz fears both rebelling against his domineeringmother and displeasing his new wife with their living arrangements. He bluntly refers to Mrs. Wolowitz as a woman who says she’s Howard's mother but sounds like his father, as well as mutters to himself that Howard is just putting himself in a bind and that it is unbelievable Americans won the Cold War. Dimitri tells Howard, after his back-and-forth on phone and computercommuniqués, "Loops, you realize you just lied your ass off to your wife and your mother," and questions what he will do when he gets back to Earth. Howard responds "Oh I'm never going back" in a shaky whisper. ("The Date Night Variable")

Dimitri talking to "Froot Loops".

Trivia

Dimitri is most likely the Soyuz Commander as he sat in the Soyuz's center seat.